Cooling means for gas-engines.



No; 673,029.' Patentd Ap. 30,1901. Y

I J. w. mwmonn. COOLING MEANS FOR GAS ENGINES.

(Application tiled Sept. 11, 1899.)

(mi Nudel.)

m: Noms Pains PHoTaCTNo., wAsmNaToN. n c

UNITED STATES PATENT OFFICE.

JOI-IN W. RAYMOND, OF OIL CITY, PENNSYLVANIA, ASSIGNOR TO THE STANDARD AUTOMATIC GAS ENGINE COMPANY, OF SAME PLACE.

COOLING MEANS FOR GAS-ENGINES.

SPECIFICATION forming part of Letters Patent No. 673,029, dated April 30, 1901.

Original application led February 21, 1898, Serial No. 6 71,193. Divided and this application filed September 11, 1899. Serial No. 730,069. (No model.)

T all whom it may concern:

Be it known that I, JOHN W. RAYMOND, a citizen of the United States, residing at Oil City, in the county of Venango and State of Pennsylvania, have invented new and useful Improvements in Cooling Means for Gas-En gines, of which the following is a specifica- `from being injured by the heat of the explosions.

This application is a subdivision of an application for patent on gas-engines filed by me February 2l, 1898, Serial No. 671,193.

vIn the accompanying drawings, Figure lis a vertical longitudinal section of a pair of tandem gas-engine cylinders having their pistons and piston-rod provided with my improved means for cooling the same. Fig. 2 is a transverse section of the same in line 2 2, Fig. 1.

Like letters of reference refer to like parts in both figures.

AA represent two working cylinders,which are arranged tandem or one behind the other on the bed of the engine and which have their opposing or inner heads A2 A2 connected by a hollow neck A3.

lB B are two pistons arranged, respectively, in the cylinders A A', and C C' C2 represent the front, intermediate, and rear sections of a pistonrod,which connect the pistons with the The front pistoncrosshead c of the engine. section C extends forwardly from the front piston through a stuiiing-box c in the front head of the front cylinder A, the intermediate piston-section C connects the front and rear pistons and extends through astungbox c2 in the connecting-neck Ag of the cylinders, and the rear piston-section C2 extends rearwardly from the rear piston through a stuffing-box c3 in the rear head of the rear cylinder.

d d' d2 d3 represent the ports, which are ah ranged at the ends of the cylinders and through which the fresh fuel is admitted into the cylinders and the spent fuel is exhausted from the cylinders.

In order to keep the pistons and the pistonrod cool, Water is passed through the same, for which purpose the pistons and rod are made hollowand connected as follows:

The opposite sides of each piston are dished inwardly-and connected by a sleeve or hub e. The front end of the rear section of the piston-rod passes through the hub e of the hollow rear piston and is secured thereto by a shoulder f, arranged on Vthe rod and bearing against the -front side of the rear piston, and a collar g, secured to the rod by a screw connection or otherwise and bearing against the rear side of said piston.

h is a plug` or disk which is driven against p an internal shoulder h in that portion of the rear section of the piston-rod which is arranged Within the hub of the rear piston and which forms a diaphragm or partition in the rod at this point. a

1l is an inlet-passage which connects the bore of the rear piston-rod section in rear of the partition with the space in the lower portion of the rear piston. This passage is formed by coinciding openings formed, respectively, in the piston-rod and in the rear end of the hub of this piston.

'el' is an upright outlet-pipe which connects the bore of the piston-rod i'n front of the partition h with the space in the upper portion of the rear piston. The lower end of the outlet-pipe passes through an outlet-opening arranged in the rear end of the hub of the rear piston and through an outlet-opening which is arranged in the rear pistonrod section in front of thepartition h and which coend of the intermediate piston-rod section is arranged in the hub of the front piston and is secured therein by a shoulder k, formed on the rod and bearing against the rear side of IOO 9 incides with the front opening of the pistony the front piston, and a collar 7c', secured to theintermediate piston-rod section bya screw connection and bearing against the front side of the front piston.

Z is a plug or partition which is driven against a forwardly-facing shoulder Z in the front portion of the intermediate piston-rod section similar to the partition-plug h in the rear piston-rod section.

m is an inlet-passage which connects the bore of the intermediate piston-rod section with the space in the lower part of the front piston and which is formed by coinciding openings formed in the intermediate pistonrod section and in the hub of the front piston in rear of theplug Z.

m is an outlet-pipe which connects the space in the upper part of the front piston with the bore of the intermediate piston-rod section in front of the partition Z. The lower end of the pipe m is tted in coinciding openings formed in the hub of the front piston and in the intermediate piston-rod section in front of the partition Z. The front piston-rod section is provided with an externally-screw-threaded rear end, which engages with the internal thread of the collar 7c.

N represents a flexible water-supply tube which is connected with the rear section of the piston-rod outside of the rear cylinder, preferably in rear of the cross-head. O represents a flexible water-outlet tube which connects with the front piston-rod section outside of the front cylinder. These flexible water inlet and outlet tubes permit the water to be admitted into the pistons and rod and to be discharged therefrom while the engine is in operation. The water entering through the supply-tube N passes forwardly through the rear piston-rod section, thence downwardly through the passage c' into the lower portion of the rear piston, thence upwardly in the rear piston and into the outlet-pipe i' thereof, thence downwardly through the latter and into the intermediate piston rod section, thence downwardly through the passage m into the front piston, thence through the pipe m and into the front piston-rod section, and then escapes through the discharge-tube O.

T his construction of the pistons and pistol rod is very simple and reliable and permits of easily assembling the parts.

I claim as my invention-- The combination with the front and rear cylinders arranged one behind the other and having their inner ends connected by a single stuiing-box and each cylinder having a stuifing-box at its outer end, of a hollow piston arranged in each of the cylinders, a hollow sectional piston-rod connecting the pistons with a water inlet and outlet and consisting of a front section which is arranged in the outer stuffing-box of the front cylinder and in the hub of the front piston, an intermediate section which is arranged in the stu'ng-box between the two cylinders and which is connected at its front end with the front rod-section, while its rear end is arranged in the hub of the rear piston, and a rear section which is arranged in the outer stuiing-box of the rear cylinder and connected at its front end with the intermediate rod-section, inlet and outlet openings formed in the hub of each piston and in the adjacent part of the sectional piston-rod, partitions arranged in the sectional piston rod between the inlet and outlet openings thereof and bearing against internal shoulders in the rod-sections, shoulders arranged on the piston-rod and bearing against one side of each piston, and collars secured to the piston-rod on the opposite side of each piston, substantially as set forth.

Witness my hand this 23d day of August, 1899.

JOHN W. RAYMOND.

Witnesses:

EVA R. BLANEY, BEssIE MCLAUGHLIN. 

